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3 years ago

I need an answer please ASAP |4+7|-|4-7|

Mathematics

2 answers:

Leto [7]3 years ago

8 0

Answer:

Step-by-step explanation:

$Hey~There!$

________________________

➜ Solve each part:

$4+7=11$

$4-7=-3$

➜ Now we need to change any negatives:

$|-3|=3$

When you see $|x|$ it means absolute value; Which is a fancy way of saying "No negative answers."

➜ Now we subtract:

$11-3=8$

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So with the above work shown the answer would be $\bold8$ .

________________________

$Hope~this~helps~Mate!\\-Your~Friendly~Answerer,~Shane$ ヅ

Rufina [12.5K]3 years ago

3 0

<h2>Answer:</h2><h2>8</h2><h2>Hope this helps!!</h2>

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A ball is launched upward from a height 40 feet above ground level. The ball’s height at t seconds is given by -16t^2=128=40 .

Nesterboy [21]

Answer:

The ball will be at 100 feet at time x=0.5 sec and at time x=7.5 sec

Step-by-step explanation:

<u><em>The correct question is</em></u>

A ball is launched upward from a height 40 feet above ground level. the ball's height at t seconds is given by h(t)=-16t^2+128t+40 At what time(s) will the ball be at 100 feet?

we have

$h(t)=-16t^{2}+128t+40$

For h(t)=100 ft

substitute in the equation and solve for x

$-16t^{2}+128t+40=100$

$-16t^{2}+128t-60=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-16t^{2}+128t-60=0$

$a=-16\\b=128\\c=-60$

substitute in the formula

$x=\frac{-128(+/-)\sqrt{128^{2}-4(-16)(-60)}} {2(-16)}$

$x=\frac{-128(+/-)\sqrt{12,544}} {-32}$

$x=\frac{-128(+/-)112} {-32}$

$x=\frac{-128(+)112} {-32}=0.5$

$x=\frac{-128(-)112} {-32}=7.5$

therefore

The ball will be at 100 feet at time x=0.5 sec and at time x=7.5 sec

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Answer:

answer is d.10

hope this helps

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Answer:

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Step-by-step explanation:

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Hope this helps!

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3 years ago

I need an answer please ASAP |4+7|-|4-7|​

I need an answer please ASAP |4+7|-|4-7|